Yesterday, Metal Gear series mastermind Hideo Kojima cleaned up his shelf and found some precious Metal Gear development materials, which he was good enough to share with us via his Twitter. (For a summary of what was shown, read this story).

Today, this rare glimpse into the vault continued with new revelations about Metal Gear, Metal Gear 2 Solid Snake and Snatcher.

If you're in a rush, this is pretty much all you need to see:

This is a look into Kojima's storage cabinet showing development files for 1988's Snatcher. Notice how one of the cases says "Snatcher 2?" Kojima confirms that this is a file consisting of a plan for Snatcher 2!

Here's a look at some of the other items Kojima showed today:

From the MSX2 version of Metal Gear 2 Solid Snake (1990), a hand drawn overall map:

Also from MSX2's MG2SS (1990), the plot's rough scenario. Kojima made this in order to get a grasp on the game goal and motivation.

A design for the title screen of MSX2's Metal Gear (1987). This was rejected.

The first design document for the PC-88/MSX2 Snatcher (1988). The title was Junker at the time. Kojima says that he wrote this recklessly after returning from a one week vacation he'd taken after Metal Gear 1's completion.

The PC-88/MSX2 Snatcher (1988) was scheduled to have a 3D gun shooting sequence. The underground of the Queen Hospital was set to be a 3D dungeon, and there was going to be a battle with Snatcher there. Shown here is a rejected map of that dungeon.

Shown here is a special script language Kojima wrote for Snatcher. The basic structural elements of the language are "IF" and "Switch" statements.

This image is from some form of compression work in producing the overseas version of MSX2 Metal Gear's wireless com dialogues.

Finally, an image of the design document from MSX2's Metal Gear 2 Solid Snake (1990). Kojima used a word processor called Ichitaro to write the document because his bosses had complained that his writing was too messy to read.